"""孙航"""
#定义字符串
#str1 = "123456"
# print(str1)
#长度
#str2 = "12345"
# print(len(str2))
#相加
# str3 = "1234"
# str4 = "1234"
# print(str3+str4)
#列表相加
# list1 = [1,2,3,4]
# list2 = [2,3,4,5]
# print(list1+list2)
#切片
# str5 = "1313hduishdu"
# print(str5[::2])
#查找
# str6 = "23dghdgdj"
# print(str6.index("d"))
#出现的次数
# str7 = "1111222333wdddsd"
# print(str7.count("2"))
#相乘
# str8 = "123" * 4
# print(str8)